## Basic College Mathematics (10th Edition)

$320 \div \frac{5}{8}$ bins needed Estimate $320 \times 1 = 320$ Solve $320 \div \frac{5}{8}$ Multiply by reciprocal of divisor. $320 \times \frac{8}{5}$ Reduce by common factor of 5 and multiply. $64 \times \frac{8}{1}$ = 512 bins needed Check $512 \times \frac{5}{8}$ Reduce by common factor of 8 and multiply. $64 \times \frac{5}{1}$ = 320 tons